JPH0117792Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay devised in which an electromagnet part and a contact part are arranged in the longitudinal direction to reduce stray capacitance between the two.

In this type of electromagnetic relay, when positioning the electromagnet part, it is ensured that errors in assembly between the electromagnet part and the contact part do not occur due to variations in the dimensions of the parts that make up the electromagnet part, and that the electromagnet part is precisely positioned. It is desired that it can be assembled at low cost.

Conventional electromagnetic relays generally consist of an electromagnet part and a contact part, and the electromagnet part is made up of an armature,
It consists of a return spring, an actuating piece, an iron core, a bobbin, an armature piece, a coil winding, and a coil terminal, of which the armature, iron core, bobbin, and coil winding form a magnetic circuit. In addition, in general relays, by grounding the iron core, armature, and armature piece, noise and surge voltage generated in the high-voltage circuit connected to the contact side are superimposed on the electronic circuit connected to the electromagnet side terminal. There are many things that are suppressing this. In addition, in this type of electromagnetic relay, the armature is attracted to the iron core when the electromagnet is energized, and when the excitation is removed, the armature is released by the spring force of the return spring, so this movement is activated. The signal can be transmitted to the contact portion through the piece, and the contact can be switched.

However, in such conventional electromagnetic relays, the movement of the armature is transmitted to the contact part through the actuating piece to switch the contact, but the position of the actuating piece where the contact part contacts the movable spring does not touch the electromagnet part. Accumulation of variations in the manufacturing dimensions of the constituent parts of the iron core, armature, bobbin, armature piece, return spring, and actuating piece can lead to deviations and problems. For example, the movable contact leaf spring may come off from the actuating piece, or the actuating piece may come into contact with the fixed contact base, resulting in incomplete relay operation. Therefore, there was a need to create a highly accurate positioning structure at a low cost that could absorb this dimensional variation. Furthermore, many relays of this type are provided with contact terminals, and in such cases, the connection between the ground terminal and the electromagnetic parts must be electrically and mechanically perfect.

The purpose of this invention is to solve these problems, improve the accuracy of the relative position between the electromagnet part and the contact part, and also create a complete electrical and mechanical connection between the ground terminal and the parts of the electromagnet part. The object of the present invention is to provide an inexpensive electromagnetic relay that can be easily obtained.

That is, the present invention includes a component in which an electromagnet part and a contact part are stored in each of an electromagnet storage part and a contact storage part arranged in the longitudinal direction of the mounting base, and the electromagnet part has an iron core penetrated in the longitudinal direction; In the electromagnetic relay, the electromagnetic relay has a grounding terminal penetrating the iron core on the contact side of the component, and the grounding terminal maintains the components constituting the electromagnet part at the same potential, wherein the grounding terminal has a spring part. However, the electromagnet part is fixed by pressing the electromagnet part in a certain direction by the spring part.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of the configuration of the electromagnetic relay of the present invention, where 1 is an electromagnet part, and 2 is this electromagnet part 1.
3 is a base for fixing the electromagnet part 1 and the contact part 2; 4 is a base for fixing the electromagnet part 1 and the contact part 2;
5 is a case that protects the relay body and serves as a dustproof cover, and 5 is a ground terminal.

In the electromagnet part 1, 1-1 is a coil winding;
-3 is an armature, 1-4 is an iron core, 1-5 is a coil bobbin, and 1-6 is an armature piece, and these parts form a magnetic circuit. 1-7 is a return spring that is connected to armature 1-3 and maintains the return state of armature 1-3; 1-8 is a coil terminal;
-9 is an actuation piece made of an insulating material. As shown in FIGS. 2A and 2B, the bobbin 1-5 is provided with a groove 1-5c in a flange 1-5a on one end side parallel to a hole 1-5b into which the iron core 1-4 is inserted. In addition, as will be described later, there is also a protruding corner 1-5d for press-fitting into a predetermined portion of the base 3, a return spring insertion groove 1-5d, and a return spring insertion groove 1-5d.
5e and the coil terminal press-fit groove 1-5f on the flange 1-
5a. Lead out the lead wire 1-1a at the beginning or end of winding of the coil winding 1-1 wound on the bobbin 1-5 from the groove 1-5c, and tie it around the leg 1-8a of the coil terminal 1-8. , and connect it to this leg 1-8a by soldering or the like. The coil terminal 1-8 has, as shown in FIG.
and a protrusion 1-8c for fitting and fixing into the insertion groove 1-5e of the bobbin 1-5. Next, as shown in FIG. 2A, the iron core 1-4 is bent at a substantially right angle to the iron core part 1-4a to be inserted into the insertion hole 1-5b of the bobbin 1-5. The leg portion 1-4b has a curved leg portion 1-4b. An armature 1-3 is provided on the end surface 1-4c of the leg portion 1-4b as described later.
is placed, and this end surface 1-4c serves as a hinge surface.
The total length of the iron core part 1-4a is made longer than the total length of the bobbin 1-5, and the armature piece 1-6 and the ground terminal 5 are fitted and fixed to the tip of the iron core part 1-4a protruding from the end face 1-5g. . That is, the armature piece 1-6 and the ground terminal 5 are provided with square holes 1-6a and 5a into which the tip of the iron core 1-4a is inserted. In addition, the armature 1-3 and the armature face 1-6 are opposite to each other.
b is positioned on the same plane as the hinge surface 1-4c of the iron core 1-4.

Here, the ground terminal 5 is as shown in FIG. 2A.
It is made of a substantially square flat plate, and an external connection terminal 5b for connecting a grounding cord is provided at one corner of the lower end, and a tongue piece 5c is provided around the square hole 5a.
will be established. Thus, the grounding terminal 5 is combined with the iron core 1-4 together with the armature 1-3, bobbin 1-5, armature piece 1-6, return spring 1-7, and actuating piece 1-9. and 3b, the ground terminal 5 is pressed against the armature piece 1-6 by the spring force of the tongue piece 5c, and each part constituting the electromagnet part 1 is connected to the wall surface which is the reference surface of the base 3. Armature 1- which constitutes a magnetic circuit by being biased towards 3c and coming into contact with each other.
3. Keep the iron core 1-4, armature piece 1-5, etc. at the same potential.

The armature 1-3 is formed as a flat plate as shown in FIGS. 2A and 2B, and a protrusion 1-3c having a protrusion 1-3b is formed at the end 1-3a. An actuating piece 1-9 made of an insulator that transmits the movement of the electromagnet 1 to the contact 2 is press-fitted into the protrusion 1-3c. 1-3d is an extrusion projection for caulking and fixing the return spring 1-7. Return spring 1
-7 is bent into a substantially "F" shape and has a tongue portion 1-7a, a hole 1-7b, and an upright piece 1-7c. By press-fitting the push-out projection 1-3d of the armature 1-3 into the hole 1-7b, the armature 1-3 is fixed as shown in FIG. 2B.
3, fix the return spring 1-7. Hook the upright piece 1-7c of the return spring 1-7 integrated with the armature 1-3 onto the lower part 1-4d of the hinge surface 1-4b of the iron core 1-4, and attach the end 1-7d to the bobbin. Insert into groove 1-5e. As a result, the return spring 1-7 causes the end face 1-3 of the armature 1-3 to
e is rotatably engaged with the hinge surface 1-4c of the iron core 1-4. Further, the armature 1-3 is constantly given a restoring force in the direction opposite to the electromagnet 1 around the hinge surface 1-4c by the restoring spring 1-7.

Next, the actuating piece 1-9 attached to the protrusion 1-3c of the armature 1-3 is formed into a substantially L-shape as shown in FIG. 2A, and the armature is attached to one leg 1-9a. Square hole 1 into which the protrusion 1-3c fits
-9b, and the other leg 1-9c has an edge 1-9 that comes into contact with the movable leaf spring 2-1, as will be described later.
d, form 1-9e. This actuating piece 1-9 is
Armature 1-3, iron core 1-4, and armature piece 1-6, which serve as electrodes for stray capacitance between the coil and the contact.
It serves to electrically insulate between the contact portion 2 and the contact portion 2.

Next, the contact portion 2 will be explained. As shown in FIG. 2D, the contact section 2 includes a movable contact base 2-3 and a movable contact leaf spring 2-3 to which movable contact leaf springs 2-2 are fixed, which are stacked vertically with a fixed contact base 2-1 in between. 4
It consists of a movable contact base 2-5 to which is fixed a movable contact base 2-5. The fixed contact stand 2-1 has a fixed contact 2-6 at its tip 2-1a, and has a protrusion 2-1b at the other end for press-fitting and fixing to the base 3, which will be described later. It has a protrusion 2-1c provided on the protrusion 2-1b in order to make the protrusion 2-1b, and a leg 2-1d for an external connection terminal bent in a direction perpendicular to the caulking surface on which the protrusion 2-1c is formed. have On the other hand, the movable contact bases 2-3 and 2-5 are connected to the movable plate springs 2-2 and 2-5.
Extrusion protrusion 2-3a for caulking 2-4,
2-5a, protrusions 2-3b, 2-5b for press-fitting and fixing to the base 3, protrusions 2-3c, 2-5c and extrusion protrusions 2-3a, 2-5a for making the press-fitting more solid. The legs 2-3a and 2-5d for external connection terminals are bent in a direction perpendicular to the plate spring crimping surface formed with the legs 2-3a and 2-5d. The movable contact plate springs 2-2, 2-4 have their end surfaces 2-2a, 2-4.
Holes 2-2b and 2-4b are provided in a, and the holes 2-2
By caulking the extrusion protrusions 2-3a and 2-5a provided on the caulking surfaces of the movable contact bases 2-3 and 2-5 on b and 2-4b, the leaf springs 2-2 and 2-4 are attached to the contact base 2. Fixed to -3, 2-5. Also, leaf spring 2
Movable contacts 2-7 and 2-8 are attached to the other ends 2-2c and 2-4c of -2 and 2-4 by caulking or the like.
Furthermore, a second
As shown in FIG.
Avoid contact with 9d and 1-9e. Thereby, it is possible to prevent the generation of friction powder due to sliding between the edges 1-9d, 1-9e of the actuating piece 1-9 and the burrs of the leaf spring tips 2-2c, 2-4c, and
It is also possible to prevent excess deflection from occurring in the leaf springs 2-2, 2-4.

Next, in the base 3, 3-1 is an electromagnet housing part, and 3-2 is a contact housing part. Electromagnet storage section 3
-1 has a convex portion 3c that presses the return spring 1-7 so that the return spring 1-7 does not come off from the insertion groove 1-5e.
and leaf spring 1- when armature 1-3 returns.
By the action of 7, a convex portion 3d that comes into contact is formed.
Furthermore, grooves 3e, 3f, and 3g for positioning and fixing the contact portion 2 are formed in the contact storage portion 3-2. Further, 3h is a concave portion that fits into a convex portion of the case 4, which will be described later, and 3i is a side wall that connects the electromagnet storage portion 3-1 and the contact storage portion 3-2, and maintains dimensional accuracy between each groove. This serves to improve the strength of the base 3 itself.

As shown in FIG. 2A, the case 4 has a through hole 4b for each terminal on its bottom surface 4a and a recess 4c for resin sealing formed around the through hole 4b. 4d is a convex portion formed on the inner wall surface 4e of the case 4, and when the case 4 is placed on the base 3, the convex portion 4d fits into the above-described concave portion 3h of the base 3.

Next, to briefly explain the operation of the electromagnetic relay of the present invention having such a configuration, the armature 1-3 is normally
is biased upward as shown in the first figure by the return spring 1-7 and is in a state of contacting the convex portion 3d (return state). In this state, the fixed contact 2-6 and the movable contact 2-
8 are in contact with each other. However, coil winding 1
-1 is energized, armature 1-3 is connected to the first
It is attracted downward (on the armature piece 1-6 side) as shown in the figure. As a result, the actuating piece 1-9 attached to the tip of the armature 1-3 moves, and the movable leaf spring 2-2, which was hooked on the edge 1-9d, returns to its original state due to its restoring force. As a result, the movable contact 2-7 attached to the tip of the movable plate spring 2-2 changes from the fixed contact 2-7 to the fixed contact 2-7.
Contact 6. On the other hand, this actuating piece 1-9 edge 1-
The movable leaf spring 2-4, to which the movable contact 2-8 is attached, is biased downward as shown in the first figure by 9e, and the movable contact 2-8 separates from the fixed contact 2-6.

Next, a procedure for assembling the device of the present invention constructed as described above will be explained with reference to FIG. 2A. First, the fixed contact block 2-1 and the movable contact block 2-1 of the contact section 2
3, 2-5 in the grooves 3g and 3h, 3 of the base 3.
Insert from the direction of the arrow shown in the figure f to contact storage part 3-
Attach contact part 2 to 2. After that, the electromagnet part 1 and the ground terminal 5 are integrated, and the corner part 1-5d of the bobbin 1-5 is inserted into the groove 3a of the base 3, and the iron core part 1-4a
Align the tips of the grooves 3b with the grooves 3b and press fit them in the direction of the arrow shown in the figure. As a result, the electromagnet part 1 is integrated with the contact terminal 5 in the electromagnet storage part 3-1 of the base 3.
is fixed.

Here, the electromagnet part 1 is connected to the wall 3c of the base 3 and the wall 3
j, but the dimension between these walls is A, the armature 1-3 that constitutes the electromagnet part 1,
When the sum of the dimensions in the same direction of the iron core 1-4, bobbin 1-5, armature piece 1-6, return spring 1-7, and actuating piece 1-9 is defined as B, the manufacturing dimensions are added to the sum B. Even if the maximum value of the above variation is considered, it must be set so that A>B. Therefore, usually A
A gap occurs where -B=C. Since the height H of the tongue piece 5c from the flat plate of the ground terminal 5 is set to be larger than the maximum value of the gap C, the electromagnet part 1 is simply press-fitted into the base 3, and the tongue piece 5c is connected to the wall 3j of the base 3. The electromagnet 1 is held between the walls 3c and 3j of the base 3 by the spring force of the deflection of the tongue 5c. However,
The electromagnet part 1 remains fixed in the base 3, and the contact point P between the electromagnet part 1 and the contact part 2 increases accordingly.
The accuracy of the positions of Q and Q (see FIG. 1) can be improved.

Next, the case 4 is assembled to the base 3 while the external connection terminals of the electromagnet part 1 and the contact part 2 are inserted into the through holes 4b of the case 4, respectively. That is, the convex portion 4d of the case 4 is connected to the concave portion 3h of the base 3.
By fitting into the case 4 and the base 3, the case 4 and the base 3 are integrated. Finally, in order to prevent flux during soldering work from entering the relay body through the through hole 4b through which the external connection terminal is inserted, a recess 4c formed around the through hole 4b is sealed. Fill the gap between the terminal and the through hole by filling it with a stopper resin. Assembly is completed in the above manner.

As explained above, according to the present invention, the grounding terminal has the function of absorbing variations in the longitudinal dimension of the electromagnet. Dimensional variations can be absorbed, and the positioning accuracy of the electromagnet part is improved, so there is no need to adjust the position of the actuating piece and the contact part after assembly. , no special work such as caulking or spot welding is required, reducing man-hours and costs.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of the electromagnetic relay of the present invention, Fig. 2 A is an exploded perspective view showing the entire electromagnetic relay of Fig. 1, and Figs. 2 B, C, and D are respectively similar to Fig. 1. FIG. 3 is an exploded perspective view showing an electromagnet section, a coil terminal, and a contact section of the electromagnetic relay. 1...Electromagnet part, 1-1...Coil winding, 1-
1a...Exit line, 1-2...Yoke. 1-3...
Armature, 1-3a... end, 1-3b...
Projection, 1-3c... Projection, 1-3d... Push-up projection, 1-3e... End surface. 1-4... Iron core, 1
-4a... Iron core part, 1-4b... Leg part, 1-4c
...End face (hinge face), 1-4d...Lower part. 1-
5...Bobbin, 1-5a...Trim part, 1-5b...
Hole, 1-5c... Groove, 1-5d... Corner, 1-5
e... Return spring insertion groove, 1-5f... Coil terminal press-fit groove, 1-5g... End surface. 1-6... Armature piece,
1-6a... Square hole. 1-7...Return spring, 1-7
a...tongue, 1-7b...hole, 1-7c...standing piece, 1-7d...end. 1-8...Coil terminal,
1-8a...leg, 1-8b...leg, 1-8c...
protrusion. 1-9... Actuation piece, 1-9a... Leg part,
1-9b...square hole, 1-9c...leg, 1-9
d, 1-9e...edge. 2...Contact part, 2-1...
...Fixed contact block, 2-1a...Tip part, 2-1b...
...protrusion, 2-1c...protrusion, 2-1d...leg,
2-2, 2-4...Movable contact leaf spring, 2-2a,
2-4a...end face, 2-2b, 2-4b...hole,
2-2c, 2-4c... end face, 2-2d, 2-4
d... Standing piece, 2-3, 2-5... Movable contact stand,
2-3a, 2-5a...Extrusion projection, 2-3
b, 2-5b... protrusion, 2-3c, 2-5c...
...Protrusion, 2-3d, 2-5d... Leg, 2-6...
Fixed contacts, 2-7, 2-8...movable contacts. 3...
Base, 3-1...Electromagnet storage section, 3-2...Contact storage section, 3a, 3b...Groove, 3c, 3d...Convex portion, 3e, 3f, 3g...Groove, 3h...Concave portion, 3
i...Side wall, 3j...Reference surface. 4...Case, 4
a...bottom, 4b...through hole, 4c...recess, 4
d... Convex portion, 4e... Inner wall surface. 5...ground terminal,
5a...square hole, 5b...external connection terminal, 5c...tongue piece.

Claims (1)

[Scope of utility model registration request] An electromagnet part and a contact part are stored in each of the electromagnet storage part and the contact part arranged in the longitudinal direction of the mounting base, and the electromagnet part has a component having an iron core penetrated in the longitudinal direction and a contact side of the component. The electromagnetic relay has a grounding terminal penetrated into the iron core, and the grounding terminal maintains the parts constituting the electromagnet part at the same potential, wherein the grounding terminal has a spring part, and the grounding terminal has a spring part. An electromagnetic relay characterized in that the electromagnet part is fixed by pressing the electromagnet part in a certain direction.